Section 1703 of Title XVII of the Energy Policy Act (EPAct) of 2005 created the Department of Energy's (DOE's) Loan Guarantee Program. The program was reauthorized and revised by the American Recovery and Reinvestment Act (ARRA) of 2009 by adding Section 1705 to EPAct. The 1705 Program was retired in September 2011, and Loan Guarantees are no longer available under that authority. DOE, however, still has authority to issue Loan Guarantees under the old Section 1703 Program.

Under Section 1703, DOE is authorized to issue loan guarantees for projects with high technology risks that "avoid, reduce or sequester air pollutants or anthropogenic emissions of greenhouse gases; and employ new or significantly improved technologies as compared to commercial technologies in service in the United States at the time the guarantee is issued." Loan guarantees are intended to encourage early commercial use of new or significantly improved technologies in energy projects. The loan guarantee program generally does not support research and development projects.

Loan guarantees are provided in response to open solicitations. A solicitation for Renewable Energy Projects and Energy Efficiency Projects was issued in July 2014, with a final Part I application due date of December 2, 2015. Up to $2.5 billion is available for projects in renewable energy, efficient end-use, and efficient generation, transmission, and distribution technologies. See the program website for more details on eligibility and the application process.

Section 1703 requires either an appropriation to cover the Credit Subsidy Cost (the expected long term liability to the Federal Government for providing the loan guarantee), or payment of the Credit Subsidy Cost by the borrower. A credit-based interest rate spread will be added to certain loans receiving a 100% loan guarantee from DOE and financing from the Federal Financing Bank. Rates and more information are availablehere.